I own an XTreme XB-700Li e-bike/scooter/motorbike whatever you will want to call it!
It has a 700W brushless motor,and a 48V/20Ah liPo battery.
I'm pretty content about the device, except for it's speed.
I live in Florida, where these bikes still are allowed to go 30MPH max (Unlike the rest of the country where they can only go 20MPH).
So I did some tests, and came to the conclusion that the bike can go faster.
There is a limiter within the bike, literally limiting it to a ~10MPH speed, and with limiter unplugged, it can go 20MPH.
The internal meter displays 27MPH, but an external speedometer tells me I'm going only 20MPH.
I find this speed quite unsafe to drive in the city, being constantly surpassed by other cars.
what I would like is to have a 10MPH boost, or increase in speed.
Worst case, I'd be really happy if my bike would go just 5MPH faster! That 5MPH makes a big difference to me!
I'm very sure that the bike is limited to the controller's speed, as with semi flat tires, going on a light hill, with wind against, the bike drives just as fast as going downhill wind in the back and fully inflated tires.
I already wrote the company, and they said that's the fastest the bike can go.
Yes, the limiting factor is definitely the controller.
So my choice is either to change the controller, or modify it.
Heck, if someone could help me getting even 2MPH more out of it, you'd be a champion!
I believe adding a second battery in parallel with the primary battery will not solve the issue, as the battery pack has more than power enough to push the bike beyond 35MPh if you ask me! I'm pretty shy of adding another battery in series with the pack i have now. If it would help, I would put a 3-6V battery max in series. I don't want to burn the controller, nor the internal electronics.
Only problem would be finding a 3-6V 20Ah battery (40Ah peak) with BMS and charger (and a way to charge them, presuming if having the battery connected in series with the other battery charging like this would not work).
If not, what would be a very good replacement controller? I don't need to go 50MPH, 25 to 30MPH is more than enough!